1323161366251 has 8 divisors (see below), whose sum is σ = 1347556245984. Its totient is φ = 1298926453440.

The previous prime is 1323161366243. The next prime is 1323161366257. The reversal of 1323161366251 is 1526631613231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1323161366251 - 2³ = 1323161366243 is a prime.

It is a super-2 number, since 2×1323161366251² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323161366257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39975036 + ... + 40008121.

It is an arithmetic number, because the mean of its divisors is an integer number (168444530748).

Almost surely, 2^{1323161366251} is an apocalyptic number.

1323161366251 is a deficient number, since it is larger than the sum of its proper divisors (24394879733).

1323161366251 is an equidigital number, since it uses as much as digits as its factorization.

1323161366251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79983461.

The product of its digits is 116640, while the sum is 40.

Adding to 1323161366251 its reverse (1526631613231), we get a palindrome (2849792979482).

The spelling of 1323161366251 in words is "one trillion, three hundred twenty-three billion, one hundred sixty-one million, three hundred sixty-six thousand, two hundred fifty-one".